EP3132302B1 - Eyeglass lens for a display device, which display device can be placed on the head of a user and produces an image - Google Patents

Description

The present invention relates to a spectacle lens for a display device that can be placed on the head of a user and generates an image, the spectacle lens having a front side and a rear side, a coupling-in section and a coupling-out section spaced from the coupling-in section, and a light guide channel which is suitable for capturing light bundles from pixels of the generated image, which are coupled into the spectacle lens via the coupling section of the spectacle lens, in the spectacle lens to the coupling-out section from which they are coupled out of the spectacle lens, the light guide channel having a first reflective layer that extends from the coupling section to the coupling-out section and on which the light bundles are reflected for guidance up to the coupling-out section.

With such a spectacle lens, there is the problem that, due to the reflective property of the reflective layer of the light guide channel, this is clearly set off for a user from other areas of the spectacle lens when viewing the surroundings through the spectacle lens.

The EP 2 343 591 A1 , WO 2010/034639 A2 , US 2013/0163089 A1 , U.S. 5,369,415 A , US 2007/0008624 A1 and the US 7 513 674 B1 each show a spectacle lens for a display device that can be placed on the head of a user and generates an image, the spectacle lens having a front side and a rear side, a coupling-in section and a coupling-out section spaced from the coupling-in section, and a light guide channel which is suitable for light bundles from pixels of the generated Images that are coupled into the spectacle lens via the coupling-in section of the spectacle lens are guided in the spectacle lens to the coupling-out section from which they are coupled out of the spectacle lens. The US 2008/094586 A1 shows a spectacle lens with the features of the preamble of claim 1. The DE 39 04 640 A1 describes an optical viewfinder system for cameras with a half mirror, which is formed by reflective and transparent sections arranged alternately next to one another.

Based on this, it is therefore the object of the invention to develop a spectacle lens of the type mentioned at the beginning in such a way that the optically striking difference between the light guide channel on the one hand and the rest of the spectacle lens on the other hand is reduced. In the case of a spectacle lens of the type mentioned at the outset, the object is achieved in that the first reflective layer has a plurality of transparent gaps spaced from one another. Thus, the transmissivity of the light guide channel is increased compared to a solution in which the reflective layer is continuous.

In the case of the spectacle lens according to the invention, the reflective layer can be segmented and have reflective segments separated from one another by the plurality of gaps.

The multiple gaps can be dated in a first direction

The coupling-in section towards the coupling-out section and / or be spaced apart transversely to the first direction.

Furthermore, the plurality of gaps can be arranged equidistantly in a predetermined direction (e.g. the first direction and / or transverse thereto). However, this is not absolutely necessary. There can also be irregular intervals.

The at least one gap can be circular, oval, or polygonal. However, any other geometric shape is also possible.

In particular, several gaps can be provided which have different shapes.

Furthermore, an angle-selective absorption layer can be arranged outside the light guide channel in front of the at least one gap in the first reflective layer, which absorbs light that strikes the absorption layer at an angle from a predetermined first critical angle up to 90 ° and absorbs light that falls below an angle of 0 ° up to a predetermined second critical angle, which is less than or equal to the first critical angle, is transmitted. In this way, for example, a bundle of light emerging from the light guide channel through the gap can be absorbed immediately. This has the advantage that this bundle of light cannot lead to undesired scattered light, which could occur if the bundle of light is further reflected at e.g. a material boundary in the direction back to the light guide channel.

In the spectacle lens according to the invention, a transition region can be formed between the at least one gap and the reflective layer, in which the reflectivity increases in the direction from the gap to the reflective layer. The increase can in particular be continuous and / or constant.

In particular, the light guide channel can have a second reflective layer opposite the first reflective layer. The second reflective layer can also have at least one transparent gap.

In particular, the at least one transparent gap in the first reflective layer can be opposite a transparent gap in the second reflective layer.

Furthermore, the two opposing reflective layers can be formed identically. In particular, they can be designed to be congruent.

The first reflective layer can be planar or curved. The same is true for the second reflective layer.

The reflective layer is in particular a mirror layer which has a reflectivity of 100% or almost 100% for visible light. However, it is also possible for the reflective layer to be designed as a partially transparent layer.

The at least one gap can preferably have a transmission of 100% or almost 100% for light from the visible wavelength range. However, it is also possible for the transmissive gap to be designed as a partially transparent layer which has a certain reflective property. In any case, however, the reflective property of the transmissive gap is lower than that of the reflective layer. The reflectivity of the reflective layer is therefore always higher than the reflectivity of the gap or gaps.

Both the reflective layer and the region of the gaps can each be designed as a metallic layer or metallic coating. It is also possible for the reflective layer and the gaps to be formed in such a way that a polarization-dependent reflection is present. In particular, light bundles of a first polarization state can be reflected (at least partially reflected) and a second polarization state that is orthogonal to the first polarization state can be transmitted.

In the case of the spectacle lens according to the invention, the front side and / or the rear side can be curved. In particular, the rear side can have a curvature which is selected in such a way that ametropia correction is effected. This leads to the advantage that the desired ametropia correction is also present for the coupled out light bundles, since these are coupled out in such a way that they exit the spectacle lens via the rear side.

The spectacle lens according to the invention can have multiple shells and, for example, have an inner shell and an outer shell. In particular, the inner and outer shells are made from the same materials.

Furthermore, the inner shell can be connected to the outer shell over a large area (e.g. glued or cemented with an optical cement or optical adhesive).

The sides of the inner and outer shell that face one another are preferably designed to be complementary to one another.

In particular, these sides facing each other can be spherically curved.

Furthermore, the outside and / or the inside can be spherically curved.

Of course, more than two shells can also be provided.

The coupling-out section can have a plurality of reflective deflecting surfaces arranged next to one another. The reflective deflecting surfaces can also be referred to as reflective facets. They can have a reflectivity of almost 100% and in this case are referred to as mirror surfaces. It is also possible that they have a lower reflectivity and are thus designed to be partially transparent.

The reflective deflecting surfaces can each be designed to be planar or curved. Furthermore, the deflection surfaces can simulate a curved reflection surface in a Fresnel-like manner, which in addition to a pure beam deflection also has an imaging property.

The coupling-out section can be buried in the spectacle lens. In particular, the coupling-out section can be designed such that the front side of the spectacle lens is a smooth, continuous surface.

The coupling-in section can be formed in an edge region of the spectacle lens and the coupling-out section can be formed in a central region of the spectacle lens.

The inner shell and the outer shell (and any other shells) can each be formed in one piece. However, it is also possible for the inner shell and / or the outer shell (and / or any further shells) to be formed in several pieces.

There is also a display device with a holding device that can be placed on the head of a user, an image generation module attached to the holding device that generates an image, and imaging optics attached to the holding device, which has a spectacle lens according to one of the above claims and which contains the generated image maps the state of the holding device placed on the user's head in such a way that the user can perceive it as a virtual image.

The imaging optics can have the spectacle lens as the only optical element. However, it is also possible for the imaging optics to include at least one further optical element in addition to the spectacle lens. In particular, the outer shell can be formed in one piece together with the at least one further optical element. Alternatively, it is possible that the outer shell with the at least one further optical element (e.g. by cementing or gluing). Furthermore, the at least one further optical element can be spaced apart from the outer shell.

The at least one further optical element can be, for example, collimation optics, which are arranged between the spectacle lens and the image generation module, so that the light bundles from the image generation module can be coupled into the spectacle lens as collimated bundles.

Furthermore, the display device can have a control unit which controls the image generation module.

The image generation module can in particular have a planar image generator, such as an LCD module, an LCoS module, an OLED module or a tilting mirror matrix. The imager may have a plurality of pixels that may be arranged in rows and columns, for example. The imager can be self-luminous or non-self-luminous.

The image generation module can in particular be designed in such a way that it generates a monochromatic or a multicolor image.

The display device according to the invention can have further elements known to the person skilled in the art which are necessary for its operation.

It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the specified combinations but also in other combinations or on their own without departing from the scope of the present invention.

Fig. 1

eine schematische perspektivische Darstellung einer Ausführungsform der erfindungsgemäßen Anzeigevorrichtung;

Fig. 2

eine vergrößerte Teilschnittansicht des ersten Brillenglases 3 einschließlich einer schematischen Darstellung des Bilderzeugungsmoduls;

Fig. 3

eine schematische vergrößerte Ansicht auf die Rückseite 15 des erfindungsgemäßen Brillenglases im Bereich des Lichtführungskanals 12 und des Auskoppelabschnitts 13;

Fig. 4

eine schematische vergrößerte Schnittansicht gemäß Fig. 2 durch den Lichtführungskanal 12, wo zur Vereinfachung der Darstellung die Vorder- und Rückseite 18, 15, die reflektierenden Schichten 21, 22 und der Auskoppelabschnitt 13 geradlinig und nicht gekrümmt dargestellt sind;

Fig. 5

eine Abwandlung des erfindungsgemäßen Brillenglases in einer Schnittdarstellung gemäß Fig. 4;

Fig. 6

eine Abwandlung des erfindungsgemäßen Brillenglases in einer Ansicht gemäß Fig. 3;

Fig. 7

eine Abwandlung des erfindungsgemäßen Brillenglases in einer Ansicht gemäß Fig. 3;

Fig. 8

eine Abwandlung des erfindungsgemäßen Brillenglases in einer Ansicht gemäß Fig. 3;

Fig. 9

eine Abwandlung des erfindungsgemäßen Brillenglases in einer Ansicht gemäß Fig. 3;

Fig. 10

eine Abwandlung des erfindungsgemäßen Brillenglases in einer Ansicht gemäß Fig. 3;

Fig. 11

eine Abwandlung des erfindungsgemäßen Brillenglases in einer Ansicht gemäß Fig. 3;

Fig. 12

eine Darstellung des Reflexionsverlaufs der ersten reflektierenden Schicht 21 in der y-Richtung;

Fig. 13

eine Darstellung des Reflexionsverlaufs einer Weiterbildung der ersten reflektierenden Schicht 21 in der y-Richtung;

Fig. 14

eine Darstellung des Reflexionsverlaufs einer Weiterbildung der ersten reflektierenden Schicht 21 in der y-Richtung;

Fig. 15

eine Darstellung des Reflexionsverlaufs einer Weiterbildung der ersten reflektierenden Schicht 21 in der y-Richtung;

Fig. 16

eine weitere Ausführungsform des erfindungsgemäßen Brillenglases in einer Schnittansicht gemäß Fig. 2, und

Fig. 17

eine weitere Ausführungsform des erfindungsgemäßen Brillenglases in einer Schnittansicht gemäß Fig. 2.

The invention is explained in more detail below, for example, with reference to the accompanying drawings, which also disclose features essential to the invention. Show it:

Fig. 1

a schematic perspective illustration of an embodiment of the display device according to the invention;

Fig. 2

an enlarged partial sectional view of the first spectacle lens 3 including a schematic illustration of the image generation module;

Fig. 3

a schematic enlarged view of the rear side 15 of the spectacle lens according to the invention in the area of the light guide channel 12 and the coupling-out section 13;

Fig. 4

a schematic enlarged sectional view according to Fig. 2 through the light guide channel 12, where, in order to simplify the illustration, the front and rear sides 18, 15, the reflective layers 21, 22 and the coupling-out section 13 are shown as straight and not curved;

Fig. 5

a modification of the spectacle lens according to the invention in a sectional view according to FIG Fig. 4 ;

Fig. 6

a modification of the spectacle lens according to the invention in a view according to FIG Fig. 3 ;

Fig. 7

a modification of the spectacle lens according to the invention in a view according to FIG Fig. 3 ;

Fig. 8

a modification of the spectacle lens according to the invention in a view according to FIG Fig. 3 ;

Fig. 9

a modification of the spectacle lens according to the invention in a view according to FIG Fig. 3 ;

Fig. 10

a modification of the spectacle lens according to the invention in a view according to FIG Fig. 3 ;

Fig. 11

a modification of the spectacle lens according to the invention in a view according to FIG Fig. 3 ;

Fig. 12

a representation of the reflection profile of the first reflective layer 21 in the y-direction;

Fig. 13

a representation of the reflection profile of a development of the first reflective layer 21 in the y direction;

Fig. 14

a representation of the reflection profile of a development of the first reflective layer 21 in the y direction;

Fig. 15

a representation of the reflection profile of a development of the first reflective layer 21 in the y direction;

Fig. 16

a further embodiment of the spectacle lens according to the invention in a sectional view according to FIG Fig. 2 , and

Fig. 17

a further embodiment of the spectacle lens according to the invention in a sectional view according to FIG Fig. 2 .

At the in Fig. 1 As shown in the embodiment shown, the display device 1 according to the invention comprises a holding device 2 which can be placed on the head of a user and which can, for example, be designed in the manner of a conventional spectacle frame, as well as a first and a second spectacle lens 3, 4 which are attached to the holding device 2. The holding device 2 with the spectacle lenses 3, 4 can be designed, for example, as sports glasses, sunglasses and / or glasses for correcting ametropia, whereby the user can be shown a virtual image in his field of view via the first spectacle lens 3, as will be described below.

For this purpose, the display device 1 comprises an image generation module 5, which can be arranged in the area of the right temple of the holding device 2, as in FIG Fig. 1 is shown schematically. The image generation module 5 can be a flat image generation element 6 ( Fig. 2 ), such as an OLED, a CMOS or an LCoS chip or a tilting mirror matrix, with a large number of pixels arranged, for example, in columns and rows.

The spectacle lenses 3 and 4 and in particular the first spectacle lens 3 are only described together with the display device 1 according to the invention by way of example. The spectacle lenses 3, 4 or at least the first spectacle lens 3 are each designed as a spectacle lens 3, 4 according to the invention or as an optical element according to the invention. The optical element according to the invention can also be used in a context other than with the display device 1 described here. Therefore, if the optical element is designed as a spectacle lens, it can of course also be designed as a second spectacle lens 4.

As best seen in the enlarged, schematic partial sectional view in Fig. 2 As can be seen, the display device 1 has imaging optics 7 which contain an optics element 8 arranged between the image generating element 6 or the image generator 6 and the first spectacle lens 3. Furthermore, the first spectacle lens 3 itself also serves as part of the imaging optics 7.

A light beam 9 can emanate from each pixel of the image generator 6. By appropriately controlling the pixels of the image generator 6 by means of a control unit 10, which can be part of the image generation module 5, the desired image can be generated. In Fig. 2 the beam path of a light beam is shown as a representative of the light bundle 9, so that the light beam 9 is also referred to below.

The light beam 9 emanating from the imager 6 runs through the optical element 8 and enters the first spectacle lens 3 via a coupling section 11 (here the end face of the first spectacle lens 3) and is in this along a light guide channel 12 up to a Outcoupling section 13 out. The decoupling section 13 has a plurality of reflective deflecting surfaces 14 arranged next to one another (which can also be referred to as reflective facets) on which the light rays 9 are reflected in the direction of a rear side 15 of the first spectacle lens 3, so that the light rays 9 over the rear side 15 emerge from the first spectacle lens 3.

Thus, if a user wears the display device 1 according to the invention on his head as intended, he can perceive the image generated by means of the imager 6 as a virtual image when he looks at the coupling-out section 13. In the embodiment described here, the user must look to the right by approx. 40 ° in relation to the viewing direction G of a straight ahead view. In Fig. 2 the pivot point 16 of the user's eye as well as the eyebox 17 or the exit pupil 17 of the imaging optics are shown for clarity. The eyebox 17 is the area which is provided by the display device 1 and in which the user's eye can move and he can still see the generated image as a virtual image.

Although in the described embodiment the coupling is carried out via the end face of the first spectacle lens 3 and thus the coupling section 11 is formed on the end face of the first spectacle lens 3, it is also possible to carry out coupling over the rear side 15 of the first spectacle lens.

As in the schematic representation in Fig. 2 is shown, both the rear side 15 and the front side 18 of the first spectacle lens 3 are curved.

The first spectacle lens 3 is also designed with two shells and comprises an outer shell 19 and an inner shell 20.

The light guide channel 12 has two opposing reflective layers 21, 22, which each extend from the coupling-in section 11 to the coupling-out section 13. The first reflective layer 21 is formed on the rear side 15. The second reflective layer 22 is formed between the inner shell 20 and the outer shell 19.

As in particular according to the enlarged view of the rear side 15 of the spectacle lens 3 Fig. 3 As can be seen, the first reflective layer 21 is not formed as a continuous layer between the coupling-in section 11 and the coupling-out section 13, but rather as a segmented layer. The first reflective layer 21 thus has reflective segments 23 which are spaced apart from one another in a first direction from the coupling-in section 11 to the coupling-out section 13, so that there are gaps 24 between the reflecting segments 23 available. No material of the reflective layer 21 is applied in these gaps 24. The gaps 24 are thus transparent.

In the schematic, enlarged sectional view in Fig. 4 it can be seen that the second reflective layer 22 has, in the same way as the first reflective layer 21, reflective segments 25 with gaps 26 provided between them. The reflective segments 23 and 25 of the two reflective layers 21, 22 are arranged so that they are opposite one another. The gaps 24 and 26 are therefore also opposite one another and thus form transparent areas which run through the two reflective layers 21 and 22.

As in Fig. 4 is also indicated, the light bundles 9 are guided by reflections on the reflective layers 21 and 22 or on the corresponding reflective segments 23 and 25 from the coupling-in section 11 to the coupling-out section 13. At the coupling-out section 13, the light bundles are then deflected in the direction of the rear side 15 by reflection on the facets 14 in such a way that they are coupled out of the first spectacle lens 3.

Furthermore, due to the provided gaps 24, 26, ambient light 27 can pass through the light guide channel 12 and can be perceived by the user when the display device 1 is attached.

The reflective layers 21, 22, the front side 18, the rear side 15 and the coupling-out section 13 are shown in FIG Fig. 4 each plan shown. In fact, in the embodiment described, they are curved. In a modification, however, the reflective layer 21, the reflective layer 22, the front side 18, the rear side 15 and / or the coupling-out section 13 can be designed flat. The non-planar layers and / or sides are then curved.

In the case of the spectacle lens 3 according to the invention, the transmission of the light guide channel 12 can thus be adjusted through the size and arrangement of the reflective segments 23, 25 and thus through the size and arrangement of the gaps 24, 26. Thus, the surroundings can still be perceived by a user even in the area of the light guide channel 12.

The transmission through the light guide channel results essentially from the ratio of the area of the reflective segments 23 and 25 to the area of the gaps 24 and 26 and from the relative arrangement of the reflective segments 23 of the first reflective layer to the reflective segments of the second reflective layer 22nd

In Fig. 5 is in the same way as in Fig. 4 Another embodiment is shown in a sectional view, which differs from the previously described embodiment in particular in that an angle-selective absorption layer 28 is arranged outside the light guide channel 12 in front of the gaps 24 of the second reflective layer 21. This serves to suppress stray light. For example, a light bundle 9 ′ can hit the curved front side 18 through a gap 26 and be reflected back from this in the direction of the light guide channel 12. This light bundle 9 ′ can then strike the absorption layer 28 at an angle such that it is absorbed by the latter and does not re-enter the light guide channel. For this purpose, the angle-selective absorption layer is designed so that it is transmissive for an angle of incidence from 0 ° up to a predetermined first critical angle and for an angle of incidence greater than a predetermined second critical angle, which is greater than or equal to the first critical angle, up to 90 ° (always based on the normal to the absorption layer 28) is absorbent. Therefore, the ambient light absorption layer 28 is transmissive, as in FIG Fig. 5 is indicated.

The described segmentation of the first and second reflective layers 21 and 22 is only to be understood as an example and of course any other geometric division or segmentation can also be carried out.

For example, the reflective segments 23 may be squares arranged in a regular pattern, as in FIG Fig. 6 is shown.

It is also possible for the reflective segments 23 to be rectangles that extend in the first direction and are spaced apart transversely thereto, as in FIG Fig. 7 is shown.

With the variant according to Fig. 8 the gaps 24 are circular and arranged in a regular pattern.

It is also possible to make the gaps trapezoidal and to arrange them accordingly as in Fig. 9 is shown.

At the in Fig. 10 In the embodiment shown, the reflective segments 23 are squares of different sizes.

At the in Fig. 11 The embodiment shown, the reflective segments are essentially at an angle to the x-direction and y-direction extending strips.

Of course, the arrangement of the gaps need not be regular. An arrangement with different distances is also possible.

Furthermore, other shapes are possible for the gaps 24 and for the reflective segments 23 than those already described. Polygons, ellipses, etc. can be used as shapes. It is also not necessary to use the same shapes. Different shapes can be used for the gaps and / or segments.

The reflective segments preferably have a reflectivity of 100% or almost 100% for visible light. However, it is also possible that they have a lower reflectivity.

The gaps can be 100% transmissive or also have a certain reflectivity. In the latter case, the gaps would be partially transparent. In any case, the reflectivity of the gaps is always lower than the reflectivity of the reflective segments and, in the same way, the transmissivity of the gaps 24, 26 is always greater than the transmissivity of the reflective segments 23, 25.

So far it has been assumed that the transition between the reflective segments 23 and the gaps 24 is abrupt. This is for the embodiment according to Figures 3 and 4 for the first reflective layer 21 in Fig. 12 shown enlarged for some reflective segments 23 and gaps 24. The reflective segments 23 have a reflectivity R2 and the gaps 24 have a reflectivity R1, the reflectivity R2 being greater than the reflectivity R1. For example, R2 can have 100% or almost 100% and R1 a reflectivity of 0% or almost 0%. However, other values for R1 and R2 are also possible. It is essential that R2 is always greater than R1.

In a further development, the transition between the reflective segments 23 and the gaps 24 does not have to be abrupt. There can be a continuous transition, as indicated by the flanks 30 in the illustration according to FIG Fig. 13 is indicated.

In this embodiment there is already a continuous transition. However, this begins suddenly or abruptly at the reflective segments 23 and the gaps 24, so that the reflectivity profile has a kink at these points and is not continuous.

Of course, the reflectivity curve can also be continuous, as in Fig. 14 is indicated. In particular, the reflectivity profile over the reflective segments 23 and the Gaps 24 be continuous, as in Fig. 15 is indicated. It is essential that there are sections with a higher reflectivity (reflective segments 23) and sections with a lower reflectivity (gaps 24).

The in connection with Figs. 12-15 The developments described can of course also be provided for the second reflective layer 22.

In the case of the spectacle lens 2 according to the invention, the back 15 can in particular have a curvature in order to effect a correction of the ametropia. This advantageously ensures that the represented virtual image is also sharply perceptible for the user, since the light bundles 9 are coupled out via the rear side 15, which is the correction surface for the user.

In the embodiment described so far, the structure of the spectacle lens had two shells. A more than two-shell structure is also possible. For example, a further inner shell can be provided that rests against the inner shell 20. In this case, both reflective layers 21 and 22 would be buried in the spectacle lens 3.

In Fig. 16 is a modification of the spectacle lens according to the invention in the same way as in FIG Fig. 2 shown, wherein in this modification the second reflective layer 22 is not provided and instead a total internal reflection takes place at the front 18.

In Fig. 17 a further modification is shown in which the spectacle lens 3 is formed as a single shell. Two reflective layers 21 and 22 are again provided, which in this case are arranged on the rear side 15 and the front side 18. The reflective facets 14 are embodied buried and preferably filled with material of the spectacle lens 3 in such a way that the front side 18 is a smooth, continuous side.

The materials of the inner and outer shells 20 and 19 are preferably the same, so that they have an identical refractive index. The inner and outer shells 20 and 19 are preferably glued over their entire surface, so that a compact first spectacle lens 3 is present.

In the case of the display device 1 according to the invention, the virtual image is reflected into the user's field of view via the first spectacle lens 3. Furthermore, the display device 1 can be designed in such a way that information or virtual images are reflected in via both spectacle lenses 3, 4. The reflection can take place in such a way that a three-dimensional image impression is created. However, this is not absolutely necessary.

The spectacle lenses 3, 4 can have a refractive power of zero or a refractive power other than zero (in particular for correcting ametropia). As shown in the figures, both the front side 11 and the rear side 12 of the spectacle lens 3 are curved. The front side 11 can in particular be spherically curved. If the spectacle lens has a refractive power other than zero in order to correct a defective vision, the curvature of the rear side 15 is generally selected accordingly in order to achieve the corresponding correction. The rear side 15 can have a curvature deviating from the spherical shape.

The holding device 2 need not be designed as a spectacle-like holding device. Any other type of holding device with which the display device can be placed or carried on the user's head is also possible.

Claims (13)

1. Spectacle lens for a display device (1) that can be fitted on the head of a user and generates an image,
   wherein the spectacle lens (3) comprises a front side (18) and a rear side (15),
   a coupling-in section (11) and a coupling-out section (13) spaced apart from the coupling-in section (11), as well as
   a light guiding channel (12) which is suitable for guiding light bundles (9) of pixels of the generated image, which are coupled into the spectacle lens (3) via the coupling-in section (11) of the spectacle lens (3), in the spectacle lens (3) to the coupling-out section (13), by which they are coupled out of the spectacle lens (3),
   wherein the light guiding channel (12) comprises a first reflecting layer (21, 22), which extends from the coupling-in section (11) to the coupling-out section (13) and on which the light bundles (9) are reflected for guiding to the coupling-out section (13),
   characterized in that
   the first reflecting layer (21, 22) comprises several transparent gaps (24, 26) spaced apart from each another for increasing the transmissivity of the light guiding channel (12).
2. Spectacle lens according to claim 1, characterized in that the several gaps (24, 26) are spaced apart in a first direction from the coupling-in section (11) towards the coupling-out section (13) and/or transverse to the first direction.
3. Spectacle lens according to claim 1 or 2, characterized in that the several gaps (24, 26) are arranged equidistantly in a predetermined direction.
4. Spectacle lens according to one of the above claims, characterized in that the at least one gap (24, 26) is formed in the shape of a circle, oval or polygon.
5. Spectacle lens according to one of the above claims, characterized in that the first reflecting layer (21, 22) is formed segmented with transparent gaps (24, 26).
6. Spectacle lens according to one of the above claims, characterized in that, outside of the light guiding channel (12), an angle-selective absorption layer (28) is arranged in front of the at least one gap (24, 26) of the first reflecting layer (21, 22), which absorption layer absorbs light which strikes the absorption layer at an angle from a range from a predetermined first critical angle up to 90° and transmits light which strikes at an angle of from 0° up to a predetermined second critical angle, wherein the second critical angle is smaller than or equal to the first critical angle.
7. Spectacle lens according to one of the above claims, characterized in that, between the at least one gap (24, 26) and the reflecting layer (21, 22), a transition region (30) is present, in which the reflectivity increases in the direction from the gap (24, 26) to the reflecting layer (21, 22).
8. Spectacle lens according to one of the above claims, characterized in that the light guiding channel (12) comprises a second reflecting layer (22, 21) which is opposite the first reflecting layer (21, 22).
9. Spectacle lens according to claim 8, characterized in that the second reflecting layer (22, 21) comprises at least one transparent gap (26, 24).
10. Spectacle lens according to claim 9, characterized in that at least one transparent gap (24, 26) of the first reflecting layer (21, 22) is opposite a transparent gap (24, 26) of the second reflecting layer (22, 21).
11. Spectacle lens according to one of the above claims, characterized in that the coupling-out section (13) comprises several reflective deflecting surfaces (14) arranged next to each other.
12. Spectacle lens according to one of the above claims, characterized in that the coupling-out section (13) is formed buried in the spectacle lens (3).
13. Display device with
    a holder (2) that can be fitted on the head of a user,
    an image-generating module (5) secured to the holder (2), which generates an image, and
    an imaging optical system (7) secured to the holder (2), which comprises a spectacle lens (3) according to one of the above claims and which, when the holder (2) is fitted on the head of the user, images the generated image in such a way that the user can perceive it as a virtual image.

Images